51718717200 has 60 divisors (see below), whose sum is σ = 165672294608. Its totient is φ = 13791657600.

The previous prime is 51718717151. The next prime is 51718717201. The reversal of 51718717200 is 271781715.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (51718717201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21548266 + ... + 21550665.

Almost surely, 2^51718717200 is an apocalyptic number.

51718717200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51718717200 is an abundant number, since it is smaller than the sum of its proper divisors (113953577408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51718717200 is a wasteful number, since it uses less digits than its factorization.

51718717200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43098952 (or 43098941 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 39.

The spelling of 51718717200 in words is "fifty-one billion, seven hundred eighteen million, seven hundred seventeen thousand, two hundred".